Analog Devices LTC3589EUJ | Demoboard DC1558A

Description

Demonstration Circuit 1558A is a multioutput power supply with a pushbutton controller and I2C, featuring the LTC3589EUJ. The LTC3589 has three synchronous buck regulators, a buck-boost regulator, an always-on LDO, and three LDO regulators. The input range of the LTC3589 is ideal for single cell Li-Ion/Polymer battery applications.

The switching regulator settings such as enables, feedback voltages, operating modes and other functions can be controlled via I2C. All of the regulators, except the always-on LDO1, can also be enabled via external enable pins. After the first regulator is enabled, the remainingenable pins use a precision threshold to allow hardwired power-up sequences. All the regulators, except LDO1, can also be enabled via the I2C. The LTC3589 has two status registers, PGSTAT and IRQSTAT, that can be used to determine the current state of the device.

The two status registers can be read via I2C and indicate which regulators are in regulation and if an undervoltage (UV) or overtemperature (OT) event occurred. The command registers which are used to control the switchingregulators and program the special functions can also be read back via I2C to assure the correct data was received.

Refer to the LTC3589 data sheet for more details on the electrical and timing specifications.

More information

• Datasheet
• IC product information